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| | Geologic Map Transecting the Highland/Lowland Boundary Zone, Arabia Terra, Mars: Quadrangles 30332, 35332, 40332, AND ... (Site not responding. Last check: 2007-10-21) |
 | | Arabia Terra is a large region of cratered terrane extending from about 20° W. longitude eastward across the prime meridian to about 300° W. longitude for an average east-west width of about 5,000 km. |
 | | The four quadrangles mapped (30332, 35332, 40332, 45332) provide a north-south strip from highland terrane in the south to lowland terrane in the north. |
 | | Although underlain by what appears to be typical highland terrane, Arabia Terra is anomalously low, with elevations generally below the planetary reference (Smith and others, 1999). |
| geopubs.wr.usgs.gov /i-map/i2746 (394 words) |
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